Ostracod recovery after Permian–Triassic boundary mass-extinction: The south Tibet record
Détails
ID Serval
serval:BIB_4A24C7F6EEC1
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Ostracod recovery after Permian–Triassic boundary mass-extinction: The south Tibet record
Périodique
Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN
0031-0182
Statut éditorial
Publié
Date de publication
2011
Volume
308
Numéro
1
Pages
160-170
Langue
anglais
Résumé
Lower to Middle Triassic ostracods from the Tulong section, south Tibet, are described here for the first time. Samples from the first two stages of the Early Triassic (Griesbachian and Dienerian) are barren of ostracods; the following stage (Smithian) revealed low diversity ostracod faunas; a substantial diversification in taxa began at the base of the fourth stage (Spathian) and developed into the first stage of the Middle Triassic (Anisian). Furthermore, exploration of additional feeding modes is developed in the Spathian and Anisian, with notable occurrence of filter-feeding taxa. High abundance of filter-feeding ostracods in Spathian and lower Anisian units indicates that benthic habitats became oligotrophic. These habitats typically harbored ostracod faunas of Mesozoic affinities, suggesting that the evolutionary turnover of ostracods was fostered by the declining input of nutrients from the Spathian on. Marked faunal similarities with other Tethyan areas, mainly the northern part of Tethys, are observed during Spathian and Anisian times.
Mots-clé
Ostracods, Early Triassic, Middle Triassic, South Tibet, Tulong
Site de l'éditeur
Création de la notice
30/10/2019 19:17
Dernière modification de la notice
01/11/2019 19:58